Scale 1:500,000 (W 99°14ʹ-- W 96°00ʹ/ N 33°16ʹ--N 28°54ʹ). 2 maps in booklet : col., mounted on linen ; 93 x 26 cm, on sheet 102 x 27 cm., folded into cover 27 36 cm.
Notes
Relief shown by gradient tints, contours and spot heights. Cover title. "2509:13/260:75." "1923 and later revisions." Revision: "R-1930." North oriented to the upper left. "Magnetic variations shown by red arrows, the flight courses are magnetic." Not for navigation; historical reference only.